Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1997-12-30
1999-12-07
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477158, 13762564, F16H 6100
Patent
active
059974370
ABSTRACT:
The hydraulic control system is used in automatic transmissions having a plurality of friction elements associated with respective transmission speeds; a hydraulic fluid source; a line pressure controller for regulating hydraulic pressure supplied from the fluid source to line pressure; a range controller for selectively supplying hydraulic pressure from the line pressure control device; a shift controller for supplying hydraulic pressure from the range controller to lines corresponding to the respective transmission speeds by control of a transmission control unit; a hydraulic pressure controller for converting hydraulic pressure from the range controller to operational pressure operating the friction elements; and a hydraulic pressure distributor for determining a hydraulic flow path corresponding to the respective transmission speeds according to the hydraulic pressure from the shift controller, and for distributing the operational pressure to each friction element in accordance with that determination. The line pressure controller includes a line pressure regulating valve for regulating hydraulic pressure from the hydraulic fluid source to line pressure; and a pressure setting valve for compensating line pressure change to maintain the line pressure to a predetermined level.
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Hyundai Motor Company
Ta Khoi Q.
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